Cylinder grinder



Jul 1, 19%;

N. SARGENT CYLINDER GRINDER Filed Jan. 22 1923 Mimi/442 daily ll,

1n earners.

Application died Januaryittit. Serial Ere. erases.

-l ing drawings, that form part oithe same.

e principal objects of the invention are to produce a tool for grinding engine cylin dare, without the es iromits bed or the cylinders irom the base, which is will be extremely amurate in its work and be easily and uickly justed. llhe prineipal teature oi the invent on consists in the novel manner of suppin the grinding stones whereby they are yiel ingly sustained uniformly from endto end by a pivotal member engag the inward side oil the stone. in the drawings, Figure l is a longitudinal part seetional view on the line 1-1 oi hivure Q.

igure 2 is cross section of the grinder on the line 2 2 of his 1.

Figure 3 is pars active sectional detail out one end of a miner stone and holder. to Rotatable tools with radially adjustable stones have been reviously'proposed but the great dificulty as been to keep th in uniform adjustment from end to end.

in the construction herein shown a circular block 1 is termed with a plurality of longitudinal radial slots 2, four being shown, though any other desirable number ma be used.

e end oi the block 1 is provided with a threaded plug 8 to which is connected a suitable flexible joint 4 by means of which the grinder is operated' plu 3 is bored centrally to receive the end 5 o the s indie 6 which is threaded right and left. e ree-n duced end 7 of the spindle 6 is journalled in the bearin 8 at the opposite end of the block 1 an is provided with a screw slot llor turning the spindle.

Cone nuts 10 and ii are threaded on the re oposite ends of the spindle 6.

e stone holders 1% having parallel sides are slidably arranged in the radial slots 2 and are formed with bevelw ends it to engage the cones Jill and i1. Grub screws it gitudinal recess opening to the outward side and in the bottom of each recess is arranged a slightly transversely curved plate extendin tromend to end. The plates 15 are pivotafiy supported at one side by spindles it or ivot screws 17 secured in the ends of the older and the outer curv face engages the stone 1? which is slidably arraned in the recess.

'le lates 15 are spring pressed outwardly hy coil sprin s 18 bedded in holes 19 in the bottom oft e recesses and enga ing the inner sides of the plates at the si e opposite to their pivotal support.

he stones are formed with slots 19' at the ends to receive the screws 20 which hold the stone from accidental displacement while allowing plenty of latitude for radial movent.

It will be readily understood that the prsure oi the springs 18 is transmitted to the stones through the medium. of the pivot plates 15, consequently the pressure wlll be uniform from end to end and a unilorm diameter will .be ground by the stones.

The adjustment'is very simple it bein merely necessary to loosen the set screws 1 and turn the spindle 6 to adjim the cone units to obtain the desired diameter which can thus be regulated very accurately.

What ll claim as my invention is 1. in a cylinder inder, the combination with a rotatable book and a radially adjustable member therein, of a radially adustable stone, a pivotal member extending longitudinall of and bearing against the inner side 0 said stone, and for holding said pivotal means in contact with the stone.

2. in a cylinder inder, the combination with a rotatable b och and a radially adjustable member therein, of a radiall adustable stone, a member extending ongitudinally of the inner side of the stone and pivoted at one side thereof and having the other side free, and a plurality of springs bearing against the free side oi said pivotal member to hold the stone extended uniformly from end to end.

3. in a cylinder rinder, the combination with a rotatable in oak having a plurality spring means of longitudinal radial slots and a common central passage connecting with said slots, holders slidably arranged in said slots having bevelled inner surfaces, adjustable ta i ered members engaging said bevelled suraces and adapted to move said holders in uniform and equal adjustment, stones ad justably arranged in said holders, pivotal members within said holders bearing uniformly throughout the length of the inner side of the stones, and s ring means for holding said pivotal mem ers against said stones.

4. A cylinder grinder, comprising, a block having a plurality of radial slots, stone holding members slidably arranged in said slots, said members being recessed lon tudinally, plates extending longitudina y withln the recesses of said holders and piv- NELSON SARGENT.

imiting the 25 

